Improved method of molding brick



UNITEDV STATESV PATENT OFFICE.

IMPROVED METHOD OF MOLDING BRICK.

Specification forming part of Letters Patent No. 38,607, dated May 19,1863.

To a/ZZ whom, it may concern:

Beit known that I, ORAN W. SEELY, of Syracuse, in the county of Onondagaand State of New York, have invented a new and Improved Method ofMolding Bricks; and I do hereby declare the following to be a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,in Which#- Figure l represents a plan of the first operation, and Fig. 2a plan of the second operation,in pressing or molding the clay or brick,as hereinafter described.

The nature of my invention consists in certain means for expelling theair from the clay while in the process of forming brick, the presence ofwhich air is well known to be the cause of their liability to crack orto be otherwise imperfect in their formation.

To enable others skilled in the art to make and use my invention, I willproceed to de` scribe its construction and operation, with reference tothe drawings, in which like letters refer to like parts.

A is the mold for the clay; B, the outer, and C the inner, piston orpresser, both being movable, the latter, C, being 'armed with a seriesof pins, P, or perforators, which pass through corresponding aperturesin the face D of the outer piston, B, and into the clay in the mold. Themold being supplied with the requisite clay, the double piston B and Ois moved forward to the position as represented in Fig. l, pressing theclay to within, say, onefourth of an inch of the intended brick, thepins P perforatng the clay to a corresponding extent. ated by aneccentric, or other well-known means, is now quickly withdrawn, givingchance of escape for the remaining air in the still unfinished brick,while, simultaneously, the outer piston with its greatest pressureforces the remaining air from the clay through the punctures or holesmade by the pins P, thus forming a brick more compact, perfect, anddurable than bricks molded from dry clay in the ordinary way.

What I claim as new, and desire to secure by Letters Patent, is-

The above-described method of perforating thebricks made of dry clay andexpelling the `air therefrom the instant the final pressure isWitnesses:

EDM. F. BRowN, HOBART H. SMITH.

The said inner piston, C, oper-

